Hang Loose Convolver (HLC)

* Requires a license key for activation. See ops guide for version history.

High quality resampler maintains filter frequency resolution regardless of host sample rate:

E.g. a 44.1 kHz, 65,536 tap FIR filter resampled at 705.6kHz host sample rate = 1,022,146 taps to maintain the filter’s frequency resolution.

HLC resampler works with .cfg files only. The resampler is engaged when HLC cannot find a matching sample rate filter when a filter is being loaded or when the host sample rate changes.

HLC provides user adjustable controls to fine tune the resamplers settings per Filterbank:

% = transition band is specified as the normalized spectral space of the input signal between the low-pass filter’s -3 dB point and the Nyquist frequency. Ranges from 0.5% to 45%.

dB = stop-band attenuation can be specified in the range from 49 to 218 decibels.

Phase = linear or minimum phase.

Double clicking on the resampler controls will reset to default settings.

Here’s an example showing the range of HLC’s resampler settings:

The orange trace is the default setting, the green trace is an intermediate setting and the blue trace is the minimum setting with optional minimum phase set.

To fine tune the resampler settings, load two Filterbanks with the same .cfg filter at one sample rate (e.g. 44.1 kHz). Leave one Filterbank with default settings and adjust the resampler controls for the 2nd Filterbank. Play music at a different sample rate to engage the resampler. Switch between the two filterbanks in real-time to tune in to the differences. Choose whichever settings sound best to your ears.

Hang Loose Convolver (HLC) is a specially designed stereo and multichannel convolver to compare “level matched” convolution filters in real time with “instant switching” between filters. Comes bundled with Hang Loose Host.

Features include:

• Windows 10 and 11. MacOS 10.15 or later including Apple Silicon and Intel-based Mac computers. Ubuntu 20.04.5 LTS or later. Raspberry Pi 64-bit OS bullseye or later
• seamless real-time switching between filters whether minimum, linear, or mixed phase
• autogain level matching with manual gain adjustment
• import Acourate, Audiolense, Focus Fidelity, rePhase, DRC-FIR and REW filters
• supports stereo 32-bit float wav FIR filters individually or bundled in a zip file and sample rates from 44.1 to 768 kHz
• supports 64 channels of digital I/O
• automatic filter switching based on host sample rate
• r8brain pro resampler maintains filter frequency resolution for any sample rate
• 6 filterbanks x number of presets = dozens of FIR filters at one’s fingertips
• supports streaming using different I/O audio devices
• zero latency, uniform partition convolution engine
• reports FIR filter latency to Host application for perfect lip-sync operation
• standalone application and VST3/AU plugin mode for system-wide and app specific convolution capabilities
• AAXPlugin for Pro Tools on Mac and Windows
• comes bundled with Hang Loose Host application that hosts HLC together with any readily available plugin.

HLC supports the industry standard config file format for both stereo and multichannel operation. Features implemented:

• input and output delays with 0.1ms resolution
• input and output channel weights
• summing input channels to a single output path – typically used for crosstalk cancellation filters
• both absolute and relative file paths to the filters are supported
• If the host sample rate changes, HLC will look for a matching .cfg filter to load automatically

Additional Info

Hang Loose Convolver Operations Guide

Hang Loose Convolver: A Listening Demonstration